From 8239fdac8cbd435257e4842c3b3429b54dc3112b Mon Sep 17 00:00:00 2001 From: Steve Loughran Date: Sun, 9 Jul 2006 16:06:47 +0000 Subject: [PATCH] well, if you put the docs in, you need to follow with the code. looks for methods. git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@420305 13f79535-47bb-0310-9956-ffa450edef68 --- .../ant/taskdefs/condition/ConditionBase.java | 11 ++ .../ant/taskdefs/condition/HasMethod.java | 165 ++++++++++++++++++ 2 files changed, 176 insertions(+) create mode 100644 src/main/org/apache/tools/ant/taskdefs/condition/HasMethod.java diff --git a/src/main/org/apache/tools/ant/taskdefs/condition/ConditionBase.java b/src/main/org/apache/tools/ant/taskdefs/condition/ConditionBase.java index 92db4b16d..38c784726 100644 --- a/src/main/org/apache/tools/ant/taskdefs/condition/ConditionBase.java +++ b/src/main/org/apache/tools/ant/taskdefs/condition/ConditionBase.java @@ -338,6 +338,17 @@ public abstract class ConditionBase extends ProjectComponent { conditions.addElement(test); } + /** + * Add a <hasMethod> condition. + * + * @param test the condition + * @since Ant 1.7 + */ + public void addHasMethod(HasMethod test) { + add(test); + } + + /** * Add an <antversion> condition. * diff --git a/src/main/org/apache/tools/ant/taskdefs/condition/HasMethod.java b/src/main/org/apache/tools/ant/taskdefs/condition/HasMethod.java new file mode 100644 index 000000000..eb7238570 --- /dev/null +++ b/src/main/org/apache/tools/ant/taskdefs/condition/HasMethod.java @@ -0,0 +1,165 @@ +/* + * Copyright 2005 The Apache Software Foundation + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ +package org.apache.tools.ant.taskdefs.condition; + +import org.apache.tools.ant.types.Path; +import org.apache.tools.ant.types.Reference; +import org.apache.tools.ant.AntClassLoader; +import org.apache.tools.ant.BuildException; +import org.apache.tools.ant.ProjectComponent; + +import java.lang.reflect.Method; +import java.lang.reflect.Field; + +/** + * test for a method + */ +public class HasMethod extends ProjectComponent implements Condition { + private String classname; + private String method; + private String field; + private Path classpath; + private AntClassLoader loader; + private boolean ignoreSystemClasses = false; + + + /** + * Set the classpath to be used when searching for classes and resources. + * + * @param classpath an Ant Path object containing the search path. + */ + public void setClasspath(Path classpath) { + createClasspath().append(classpath); + } + + /** + * Classpath to be used when searching for classes and resources. + * + * @return an empty Path instance to be configured by Ant. + */ + public Path createClasspath() { + if (this.classpath == null) { + this.classpath = new Path(getProject()); + } + return this.classpath.createPath(); + } + + /** + * Set the classpath by reference. + * + * @param r a Reference to a Path instance to be used as the classpath + * value. + */ + public void setClasspathRef(Reference r) { + createClasspath().setRefid(r); + } + + public void setClassname(String classname) { + this.classname = classname; + } + + public void setMethod(String method) { + this.method = method; + } + + public void setField(String field) { + this.field = field; + } + + public void setIgnoreSystemClasses(boolean ignoreSystemClasses) { + this.ignoreSystemClasses = ignoreSystemClasses; + } + + /** + * Check if a given class can be loaded. + */ + private Class loadClass(String classname) { + try { + if (ignoreSystemClasses) { + loader = getProject().createClassLoader(classpath); + loader.setParentFirst(false); + loader.addJavaLibraries(); + if (loader != null) { + try { + return loader.findClass(classname); + } catch (SecurityException se) { + // class found but restricted name; this is + // actually the case we're looking for in JDK 1.3+, + // so catch the exception and return + return null; + } + } else { + return null; + } + } else if (loader != null) { + return loader.loadClass(classname); + } else { + ClassLoader l = this.getClass().getClassLoader(); + // Can return null to represent the bootstrap class loader. + // see API docs of Class.getClassLoader. + if (l != null) { + return Class.forName(classname, true, l); + } else { + return Class.forName(classname); + } + } + } catch (ClassNotFoundException e) { + throw new BuildException("class \"" + classname + "\" was not found"); + } catch (NoClassDefFoundError e) { + throw new BuildException("Could not load dependent class \"" + e.getMessage() + + "\" for class \"" + classname + "\""); + } + } + + + public boolean eval() throws BuildException { + if(classname==null) { + throw new BuildException("No classname defined"); + } + Class clazz=loadClass(classname); + if (method!=null) { + return isMethodFound(clazz); + } + if(field!=null) { + return isFieldFound(clazz); + } + throw new BuildException("Neither method nor field defined"); + } + + private boolean isFieldFound(Class clazz) { + Field[] fields = clazz.getDeclaredFields(); + for(int i=0;i